Improvement in metallic grommets



dntrii ,glatte aient deities.

`.ici-1N MAm'o-r rnILADELP-nia, PENNSYLVANIA, Assicnoa To 1 nuisent AND HAZLE'roN w. Ciminna-or SAME PLACE.

IMPROVEMENT IN METALLIC GROMMETS.

The Schedule referred to in these Letters' Patent and m'aking part of the same.

To all lwhom it may concern:

Be it known that I, JOHN MAimoi' thecity of Phil` adelphia, county of Philadelphia, and State of Penn- Lsylvania, have invented a new and` useful Improve-- ment in Metallic Grommets#i and I do hereby declare that the following is f'ull, clear, and exact description of the construction and operation ot' the same', reference being had to the' accompanying drawings, making a part oi' this specification, in which Figure is a perspective view of my improvement in grommets.

Figure 2 vis a view, showing the form inw-bieb the canvas is eut prior to inserting the grommet.

Figiire 3 is a view, Vshowing the grommet inserted in `the canvas prior to heling' riveted. p

Figure 4 is a detached AView ot' the metallic ring used in connection with the grommet. f

Figure 5 is a view, showing the grommet when com- 'pressed or riveted in the canvas.

Figure 6 is a sectional view of same.

The object of my invention is to construct a grommet, so that when it is secured in the canvas or cloth, it will hold in the material firmly, without danger of being torn or pulled out, and will also prevent all ripping or umavelling 'of' the canvas surrounding it.

I am aware of' a patent granted to Thomas Alexander, under date of June 20, 1854, for `metallicl grommets, inwhich the surface of the rings, where they come in contact with the canvas or cloth, is roughened and provided with a series of sharp prongs', so as to make the canvas hold -firmly. This I intend dispensing with, and iise,`instead, a metallic ring for the purpose of clamping the canvas between it and theilange of the grommet.

To enable those skilled-in the art to make and use my invention, I will 'now proceed to describe its construction and operation. l

`I form, by stamping out of sheet-brass or other pliable metal, two ilanges, F and F', with the outer edges turned over, and the centre portion iliade in the form of a tube, one fitting into the other. Euch-cling the 'tube part ofthe flange F', is a metallic ring, R, mad'eof round iron or brass.

W'hen the grommet is inserted in the canvas or cloth, two cross-cuts of propel' length, as shown in fig. 2, are made inthe materiah- The 'tube part of' the flange F, is' then inseited through the opening. The points,

and that part orportionrof' the material left by cutting through, will remain close to the outside of' the tube. The ring R is then passed over the material and holds it (the material) firmly against the tube, asshown in fig. 3. The tube part ofthe ilange'F being made "slightl y tapering, is inserted in the tube of the flange F'. The. flanges are now pressed firmly together, and the endsz ofthe tube of the flange F, passing through the tubeof the flange 14",.are turned down and riveted securely on to the iiange F, as shown in fs. 5 and 6.

Having thus described my inv ntion, its construction andV operation,

What I claim, and desire to .secure by Letters Patent of the United States, is-

'lhe application of the metallic ring R to the ilanges F or F', so that when the tube part oi' one is inselted into the other, the-canvas will pass between the tube and the ring R, and thus hold they grommet firmly in the canvas or cloth when pressed or riveted together;

e Witnesses:

ISAAC R. OAKFORD, Helgv ltoELLIG.

vJ OHN MAIR. 

